Filter



R. T. LIGHTFOOT..

num, FILED AUG. 3.1921.

IN V EN TOR.

in iii-fi fw is o li atenten reo. n?,

EGHTEGGT, C?? LGS ANGELES, CLFOFJNA.

FILTER.

Application :Filed August 3,

To will fn/mlm. it may concern:

Be it known that l, Rionann T. incrirroo'r, a citizen oi the United States, and a resident oit Los Angeles, in the count;7 of Los Angeles and State ot (lalitornia, have invented certain new and useiul improvements in Filters, oi which the iollowing` is ay specification.

This invention relates to means 'for ltering liquids, and refers more particularljj,Y to a. iilter which can be readily a tached to the domesticl faucet so that the water supplied through said faucet can be filtered be't'ore being used.

iin object of the invention is to secure either iiltered or unliltered water, as desired.

Another object is to provide a device oi this character which is convenient to use and keep clean.

Another object is to mal; provision 'tor grinding or rubbing' the entire outer tace ot the filtering element so as to clean sedimentary deposits from said face.

rrnother object is to provide tor convenient flushing' out o'l the impurities and powdered filtering' material removed Vlrom the iiltering` element by the grinding' operation.

rlhis filter is an improvement on the filter embodied in my co-pendinrg application. Serial No. 870,153, iiled March 31, 1920. and a further object is to increase the available filtering area.

Another object, distii'iguiShingl trom the device disclosed in my covendingapplication mentioned above, is the simpliiication oit the filter.

The accompanying drawings illustrate the invention:

Figure 1 is a iront elevation, partij! in section, of a filter embodying thc invention. the saine being shown in position on faucet.

Figure is a sectional elevation et the filter on a plane parallel with the plane ot the drawing, the filtering); element being; shown in non-filtering' position.

Figure 3 is a sectional elevation similar F i iure 9 excepting that the iilteri. j element is shown in position 'for filtering the liquid.

-There is provided a hollow bodj.Y 1. the end portions ot which are hemispherical in form. T he body is of slightlj,7 Agreater diameter longitudinally than transverselv, and comprises, in this instance, two separable sections 2, 3, 'unset-ed screw threads e or other snit4 1921. Serial No. 439,426.

able means. rllhe section 3 is provided with a screw threaded nipple 5 tor attachment to faucet such as trat indicated a in Figure the drawings. inside ot the body 1 is hollow spherical liltering; element 6 orrned, in the instance shown, oi hem ispherical chambered sections 7, 8. During the process oi mauut'acturing the sectie-us 7. S

are firmly secured to each other bv suitable means as, for example. cement indicated at 9. TWhen the sections T, 8 are assembled the)y iorm a spherical chamber 10 into which the liquid must pass after said liquid lters through the iiltering; element trom the outside thereof.

The liquid issues from the chamber 10 through a tubular nozzle 11 which is inserted in an opening in trie iiltering;` section 8 and is secured in said opening by cement 13, rlllhe nozzle 11 entends into the chamber 10 and communicates with said chamber through a port or ports 11i. rilhe nozzle 11 mayY be further secured in place in the filtering element by a pin 15 proiectingfr transversely through the nozzle 11 and having' its ends seated in recesses 16 -formed in the filtering` section 7. The cement 9 also extends into said recesses 1G so te securclv hold the pin 15 in place.

The nozzle 11 projects through a stulingg box gland 17 having an annular packing-1r member 18 which surrouncs the nozzle 11 and serves to insure against lea-,hapje ot liquid past said nozzle. The outer end ot the nozzle is preferabliT bent to form a downturned spout 19 which serves to direct the water or other liltered or uniiltered liquid into any vessel that may be placed beneath rihe nozzle 11 is also provided with a port or ports 2O positioned appropriately to communicate with the chamber 21 ot the bodv 1 when the section 8 is spaced from the section 2, as in Figure 2. When the filtering section 7 is spaced suthcienth7 from the bodT section 3, the ports 20 register with the packing member 18, which thus also 'tuncti as a valve to close said ports. rFhis position of the port-s is illustrated in Figzure E.

The invention operates as is summe' that the .filter has gist been installed.. as shown in Figure 1. and that it is desired to draw unfiltered water, the nozzle 11 will be grasped and pushed inwardlv as far as it will go. if it is not alreadyv in such position. This will open the ports 20. igure 2, so permit lia` iid entering the chamber 2l from the faucet a to fior.' from said chamber through'the nozzle l1 into any vessel placed to receive the liquid. The faucet will then be opened'in the customary manner, and will be closed as soon as the desired amount of liquid has been drawn'.

When it is desired to draw only filtered water, the nozzle il will be grasped and pulled outward as far as possible, as in Figure 8, to close the ports 20. The faucet will now be opened to admit the liquid to the chamber 2l rearward of the filtering element. hen the filtering element is in this position it constitutes a ball valve and fits perfectly in the seat formed `by the hemisphcrical inner face of the body section 2 so as te further insure against the possibility of any buty filtered liquid discharging from the filter. The liquid thus admitted to the chambery 2l, being under pressure, is forced through the wall of the filtering element rinto its chamber l0 from which it flows through ports 14@ into the nozzle ll.

After the filterv has been Yin use Vfor a period of time, itis desirable to cleanse it so that the liquid will not filter too slowly. To clean, the filtering element will be moved. into the two positions shown in Figures 2 and 3, and when in these positions the nozzle l1 will be turned so as to rotate the liltering element While it is in contact with the wall of the body l. Sufficient pressure of the filtering element against the body l will be maintained by the operator to effect the desired trituration of the outersurface portions of the ltering element and what ever sedimentary deposits there may be associated therewith.

Two or three revolutions of the filtering element inthe different positions will be ordinarily sufficient-,and when the grinding operation is complete the filtering element will be moved to an intermediate position and the faucet opened so as to wash the debris from the chamber 2l.

It will be clear from the foregoing description that the filter' is of exceedingly simple construction, inexpensive to manufacture and not readily put out of order. it is also to be noted that the entire outer surface of the filtering element is available for filtering and that the spherical construe tion of said filtering element increases ltheV closely fit the smaller portions of the chan" Y ber when moved toward the ends thereof,

and means extending through one of the openings and operative to move the filtering` element toward either end of thev chamber and to turn said element to cause grinding thereof against the inner surfaces of the chamber.

2. In arfilter, the combination of a chain-A ber having a hemispherical end portion and having openings, a f filtering element of smaller size than said chamber `raving a hemisphericalportion to lit the hemispherical end of the chamber'when moved theretoward, and means extending through one of the openings and operative to move the filtering element into contact with the hemispherical end.

3. In a filter, the combination ofa chamber having hemispherical end portions and having openings, a filteringV element of smaller size than said chamber having hemispherical portions to fit the hemispherioal ends of the chamber when moved theretoward, and means extending through one of the openings and operative to move the filtering,element'toward either end of the chamber and to turn said element to cause grinding thereof against the inner surface of the chamber.

4. In a filter, the combination of a chamber having openings and having hemispherical end portions, an approximately spherical hollow filtering element` in the chamber adapted to lit either endrof the chamber, a nozzle Vhaving one end fixed to the filtering element and projecting into the recess there of and extending through one of the openings `of the chamber. K

Signed at Los Angeles, California, this 26th day of July, 1921. Y

RICHARD T. LGHTFGOT. 

